RBTC Enter auction
Sealed collectibles on Bitcoin

2,222 pieces
sealed on Bitcoin

Every number and seal state is written on-chain — permanent, public, verifiable.
What's inside, only the holder can open.

Enter auction → See the wall
2,222
Pieces
1
Fully open — one only
5
Seal tiers
45s
Per-piece bid window

What this is

In one line: each piece is encrypted, the ciphertext is inscribed on Bitcoin, and the key is issued only to whoever holds that inscription.

01

Encrypt

Each piece is encrypted on its own into ciphertext, with a content fingerprint computed alongside it.

02

Inscribe

The ciphertext and fingerprint go into Bitcoin as an inscription. Anyone can see it exists. Nobody can see what's inside.

03

Hold

Ownership lives on-chain. Whoever holds the inscription gets the key — by a rule that is public and verifiable.

04

Trade

Sell it on any existing Bitcoin marketplace. We don't run a market and don't stand in the middle of a sale.

Seal tiers

The lower the number, the less the background is eroded — the only rule you need to read rarity at a glance. The figure itself stays clearly visible; only the surroundings are masked.

#0001 — Open
#0001
Open
The only piece with a complete background.
#0060 — Thin
0002 – 0133
Thin
Background bitten away in a few spots.
#0400 — Mid
0134 – 0666
Mid
Half the background gone.
#1100 — Heavy
0667 – 1600
Heavy
Most of the background gone, a ring left around the face.
#2000 — Full
1601 – 2222
Full
Background almost entirely black, one amber line remains.

How to bid

No allowlist, no sign-up. The conveyor moves one piece at a time — the highest bid when the window closes takes it.

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Connect

Click connect. The site reads your network; if it's the wrong one you get a one-click switch. Nothing is signed on page load.

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Wait for your number

The conveyor advances on a fixed rhythm, opening a window of roughly 45 seconds per piece.

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Bid

Highest bid wins. Outbid someone and they can come back — the winner is whoever stands when the window closes.

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Claim

Sign to verify and give us your Bitcoin address. We inscribe within 48 hours, then hand over the inscription and the key together. That's the moment you find out what you have.

How we differ

Same lane — Bitcoin and privacy — but this cell was empty.

Project typeWhat it shipsWhat's hidden
ResearchProtocol papersNothing — no consensus change claimed
TokenFungible tokensAccount balances
Other collectiblesImage NFTsNothing — images are fully public
RBTCCollectiblesThe artwork itself

FAQ

What exactly do I get?

A Bitcoin inscription — number, seal tier, content fingerprint and the encrypted content — plus the key that opens it. The inscription is the asset; the key is what lets you see the artwork.

Can anyone else see my piece?

No. On-chain there is only ciphertext and a fingerprint. The fingerprint proves the content hasn't been swapped, and it can't be reversed into the artwork. Only a key holder can open it.

Can I resell it? Do I need your permission?

No permission needed, and we can't stop you. List it on any existing Bitcoin inscription marketplace. Once a buyer holds the inscription the key is issued under the public rule — whoever holds it, gets the key.

Is key issuance up to you?

The rule is public: hold the inscription, get the key — no exceptions. It's decided by on-chain ownership, not by our database. Anyone can check it against their own Bitcoin node.

Why are some bright and some almost black?

By design. The earlier the number, the more background is preserved — #0001 is the only fully open one. But the figure stays clearly visible at every tier, so every piece reads at a glance on a marketplace.

Is this zero-knowledge?

No. We use standard encryption: content encrypted on-chain, keys issued separately. We make no claim to technology we haven't built.